Alan Abraham Buffenstein, M.D
Psychiatry Physician · Honolulu, HI
Alan Abraham Buffenstein, M.D is a psychiatry physician with a practice address in Honolulu, Hawaii, and NPI 1639278104, issued on Sep 21, 2006. Check the license (Hawaii 5407, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Alan Abraham Buffenstein
- Credential
- M.D
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 5407 HI
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Ward Ave, Honolulu, HI 96814
- Phone
- (808) 548-5400
- Enumerated
- Sep 21, 2006
- Record last updated
- Feb 1, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (808) 548-5408
- Medicare enrollment
- Enrolled (PECOS I20040922000433); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 331 in Hawaii → Look up another NPI →
Also registered at 1100 Ward Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alan Abraham Buffenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 5407Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average psychiatry physician in 2024
2,473 Medicare Part D claims for 82 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Clonazepam157 claims
- Clozapine137 claims
- Quetiapine Fumarate135 claims
- Olanzapine130 claims
- Trazodone Hcl118 claims
- Haloperidol88 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,160.57
18 payments; by number, the most common kind was food and beverage; the largest payer was Neurocrine Biosciences, Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Alan Abraham Buffenstein among 331 psychiatry physician records in Hawaii
Alan Abraham Buffenstein, M.D is one of 331 psychiatry physician records with a practice address in Hawaii. 60% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 62% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileYes · 33% of these records are
- Graduated1977 · median 2003 among the 110 with a school on file
- Record last updated2011 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
175 psychiatry physician records list a practice address in Honolulu
They are 175 of the 12,408 NPPES records with a practice address in Honolulu, and 331 psychiatry physician records in Hawaii.
All 331 in Hawaii → Every provider in Honolulu → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Jason Glipa, M.D.Honolulu, HI 968141265462220
- John Guo, M.D.Honolulu, HI 968141114016623
- Esther Kawano, MDHonolulu, HI 968141730122995
- Rudolf Kuszmider, M.D.Honolulu, HI 968141689750978
- Dennis Lind, M.D.Honolulu, HI 968141750384293
- Michael Mahelsky, M.D.Honolulu, HI 968141841204914
- Michael McCanless, MDHonolulu, HI 968141043310162
- Clifford Okumoto, MDHonolulu, HI 968141194714238
Common questions
What is Alan Abraham Buffenstein, M.D's NPI number?
Alan Abraham Buffenstein, M.D's National Provider Identifier (NPI) is 1639278104, issued on Sep 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alan Abraham Buffenstein, M.D located?
The NPPES record lists a practice address at 1100 Ward Ave, Honolulu, HI, 96814. Phone: (808) 548-5400. Providers update this record themselves, so call before visiting.
How can I verify Alan Abraham Buffenstein, M.D's license?
NPPES lists Hawaii license number 5407, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alan Abraham Buffenstein, M.D prescribe under Medicare Part D?
In 2024, Alan Abraham Buffenstein, M.D had 2,473 Medicare Part D claims for 82 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.